Comparison

Grav Box vs Water Simulator

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Grav Box

Control gravity with a tap and hold to manipulate objects. Customize their appearance, explore dynamic physics, and engage in arcade challenges with leaderboards and achievements.

Highlights
  • Tap and hold to control gravity
  • Customize grav colors and emojis
  • Dynamic backgrounds and physics effects
  • Arcade mode with achievements
  • Global leaderboards
  • In-game events like black holes
Features
Read full description

Grav Box places gravity at your fingertips. Tap and hold on the screen to control the gravitational field around your gravs and manipulate them in limitless ways. Customize your entire experience by setting gravs to any color or emoji, explore dynamic backgrounds and physics effects, and even modify the effects of gravity itself. With custom preferences set, head to the arcade to unlock achievements and compete against global leaderboards. Be prepared for black holes, gravitational shifts, and many other in-game events that will impact your gameplay.

About

Water Simulator

Experience realistic fluid physics with particle simulation. Tap to create streams, tilt your device to control gravity, and explore various fluid types. Offers a relaxing and immersive visual experience.

Highlights
  • Realistic fluid physics simulation
  • Touch interaction for particle spawning
  • Gyroscope control for gravity direction
  • Multiple fluid presets (water, honey, oil, mercury, lava)
  • Haptic feedback for particle interaction
  • Real-time FPS display
Features
Read full description

Turn your screen into a little fluid playground. Tap to create water particles and watch them gather, flow, splash, and bounce through a touch-responsive physics simulation. POUR, WATCH, EXPERIMENT Start with the basic water simulation and 50 particles. Touch the screen to add a stream, watch how particles interact, and clear the scene when you want to begin again. Haptic feedback and an FPS readout add another layer to the experience. CHANGE THE WAY LIQUID MOVES An optional Pro subscription unlocks gyroscope gravity controls, additional fluid presets, and physics customization. Try water, honey, oil, mercury, or lava-inspired settings, then adjust available color, viscosity, surface tension, bounce, and particle-size controls. • Tilt your device to change gravity with Pro • Compare the feel of thick and thin simulated liquids • Try different particle colors and sizes • Change the physics and observe the result • Use the sandbox at your own pace, without scores or deadlines FREE AND PRO Basic water and the 50-particle tier are free to try. Pro removes the free-tier particle cap and unlocks the listed customization features; practical performance still depends on your device and simulation settings. Plans and local pricing appear before purchase. Subscriptions renew automatically unless canceled through your Apple account settings. A sensory toy for curious hands and a quiet pause. The named presets are simulated particle behaviors, not actual liquids or a laboratory measurement tool. No claim is made to diagnose or treat ADHD, anxiety, or any other condition. Privacy: https://apple.caserlegal.com/privacy.html Terms: https://apple.caserlegal.com/terms.html Support: https://apple.caserlegal.com/support.html EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Grav Box4 screens
Water Simulator3 screens

Verdict

The call

The clearest difference is review sentiment: Grav Box at 96% against Water Simulator's 0%. Grav Box also leads on rating (4.8 vs 3.0) and ratings volume (26 vs 2). Water Simulator's advantage is ads (none vs shown) and update cadence (every 5 days vs every 5 months). On price, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Grav Box sells 10 one-off in-app purchases and Water Simulator sells 3 in-app purchases, starting at $0.29 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Grav Box holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: Grav Box has 26 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 96% of Grav Box's written reviews are positive against 0% of Water Simulator's.

UpkeepUpdate frequency

Grav Box ships an update every 5 months, Water Simulator every 5 days. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.

Scorecard7 real differences · 3 level
Grav Box versus Water Simulator: the parameters behind the verdict, then further details
ParameterGrav BoxWater Simulator
PriceFreeFree
Rating4.8 (26 ratings) — better3.0 (2 ratings)
Positive reviews96.0% of reviews — better0.0% of reviews
Number of ratings26 — better2
Update frequencyEvery 5 monthsEvery 5 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS14.0 — better18.0
Further details — not scored
Size10 MB8 MB
Age rating4+4+
DeveloperGianluca CapraroAdam Doherty

Customer experience

Grav Box

All ratings26 ratings
Positive96.2%
Neutral0.0%
Negative3.8%
Written reviews25 reviews
Positive96.0%
Neutral0.0%
Negative4.0%

Water Simulator

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

10 purchases

Grav Box

One-time10
  • Gold Blocks (100) Pack$0.99
  • Light Portal$0.99
  • Dark Portal$0.99
Show 7 more
  • Grav Box$0.99
  • Midnight$0.99
  • Daybreak$0.99
  • Beach$0.99
  • Jungle$0.99
  • Mist$0.99
  • Gold Blocks (1000) Pack$4.99
3 purchases

Water Simulator

Subscriptions3
  • Weekly$0.297 Days
  • Monthly$0.991 Month
  • Yearly$9.991 Year

Questions

Is Grav Box free?
Grav Box is free to download, with in-app purchases available.
Is Water Simulator free?
Water Simulator is free to download, with in-app purchases available.
Which has better reviews, Grav Box or Water Simulator?
Grav Box is rated higher. Grav Box averages 4.8 out of 5 from 26 ratings, while Water Simulator averages 3.0 from 2 ratings.
Do Grav Box or Water Simulator have ads?
Grav Box shows ads; Water Simulator does not.
Which is updated more often, Grav Box or Water Simulator?
Grav Box ships an update every 5 months, and Water Simulator every 5 days. Most recently, Grav Box was updated on October 24, 2026 and Water Simulator on October 23, 2026.

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